Aquarium LED lighting Fluval Plant 4.0, 22W, adjustable length 38.4–63 cm, Bluetooth control

Fluval Plant 4.0 is an LED aquarium light designed for freshwater planted tanks. Delivering 22W of power with an adjustable length spanning 38.4–63 cm, this fixture provides a plant-focused light spectrum, dimming capability and Bluetooth control for remote adjustments and scheduling. The unit is intended to support photosynthesis, healthy plant growth and an attractive visual display while fitting a range of rimmed and rimless aquariums within its adjustable range.

Advantages

The light offers a programmable spectrum and intensity tailored to aquatic plants, enabling daytime cycles, sunrise/sunset transitions and dimming to reduce algae bloom risk while supporting photosynthetic needs. Bluetooth connectivity allows convenient control and scheduling from a smartphone or compatible device. The adjustable mounting span accommodates multiple aquarium widths, and the LED design provides energy-efficient operation with long service life compared with traditional lighting.

Suitable for

• Small to medium freshwater planted aquariums with a tank width between 38.4 cm and 63 cm
• Hobbyists who need programmable day/night cycles and adjustable intensity for plant growth
• Setups requiring a plant-focused spectrum to enhance photosynthesis and colour rendition

When it may not be suitable

This fixture may not be appropriate for very large aquariums that exceed the maximum adjustable span, or for marine/saltwater tanks that require different spectral characteristics. High-light demanding plant species or densely planted tanks may require additional lighting or supplemental fixtures to achieve optimal intensity throughout the substrate.

Key specifications

• Power consumption: 22 W
• Adjustable span (mounting/coverage): 38.4–63 cm
• Light source: LED array with plant-focused spectrum
• Control: Bluetooth wireless control and programmable cycles
• Functions: Dimming, sunrise/sunset simulation, scheduling

How to use

Mount the light according to the included mounting instructions, adjusting the span to fit the aquarium width between 38.4 and 63 cm. Connect the fixture to power, then pair with the Fluval mobile app (or compatible control app) via Bluetooth. Use the app to select preset lighting programs or create custom schedules, set intensity levels, and program gradual transitions for dawn and dusk. Monitor plant response and adjust duration and intensity incrementally to match the needs of your specific plant species.

What to consider before purchase

• Measure your aquarium width to confirm it falls within the 38.4–63 cm adjustable range
• Verify that a plant-focused LED fixture meets the light requirements of the plants you keep
• Ensure you have a compatible smartphone or device for Bluetooth control and scheduling

Usage recommendations

Start with moderate daily photoperiods (e.g., 6–8 hours) and medium intensity, observe plant growth and algae development for two to four weeks, then adjust intensity or duration as needed. Use gradual sunrise/sunset settings to reduce stress on livestock and avoid abrupt light changes.